baber/WOPTO huggingface dataset:
Patent KR-800000075-B1 (KR)
Title: Reactivation of phosphorous-vanadium-oxygen complex oxidation catalyst by treatment with halide containing material
Inventor: PARTENHEIMER W
IPC: B01J21/20
Filed: 1976-09-22
Granted: 1980-01-30
Abstract: The P-V-O complex catalysts used for the oxidn. of hydrocarbons, esp. for the prodn. of maleic anhydride(I) from butane were reactivated by treatment with hydrogen halide b.p 250≰C.  Thus, a catalyst having P-V at ratio 1.2 and V-Zn promoter at ratio 0.2 was used to oxidize butane at 450≰C, giving initial conversion 83% and I selectivity 62%, and conversion and selectivity 94% and 27%, after 18 hr.  The catalyst was treated with CCl4 for 30min at 400≰C by adding the gaseous compd. to the butane-air feed at the normal residence time.
Patent KR-800000787-B1 (KR)
Title: Process for exchange of hydrogen isotopes between streams of gaseous hydrogen and liquid water
Inventor: BUTLER J
IPC: B01J23/42
Filed: 1977-06-07
Granted: 1980-08-11
Abstract: The process for the exchange of H isotopes by using a packed-bed catalyst is described. In the process, streams of liq. water and H are simultaneously brought into contact with each other and with a packed-bed catalyst, with both streams at 273-573oK. One of the streams contains a H isotope in excess concn. over that existing when the streams of liq. water and H gas are in isotopic equil. The other streams contains a H isotope concn. which is lower than the existing.
Patent KR-790001462-B1 (KR)
Title: Compostion of surface-treatment for artificial natural-stoon
Inventor: SON SAM PIL
IPC: B28B11/00
Filed: 1978-01-24
Granted: 1979-10-20
Abstract: Coating compd. (I) manufg. process for surface treatment of artificial natural-stone was described. (I) gave to the surface of stone water proof, water repellant, weather protection, crack prevention, stain proof characteristics and were consisted of paraffin chloride 5%, carbon black 0.7%, ground copper grain 0.3%, wax 2%, and organic solvent 87%.  The compounds, except pigment gradient dissolved in organic solvent, were added to a common surfactant and pigment was dissolved into the water.
Patent KR-820000675-B1 (KR)
Title: Boron -containing electrical steel having a calcium borate coating and magnesia over coating and process therefor
Inventor: AREND R
IPC: H01F1/04
Filed: 1978-03-07
Granted: 1982-04-22
Abstract: Grain-oriented B-containing Si steel sheets with improved magnetic properties are produced by electrodeposition of Ca(BO2)2 onto fine-grained primary recrystd. Si steel using an aq. electrolyte at >=65≰C and pH 7 contg. Ca(AcO)2 boric acid, and solid Ca(BO2)2 followed by electrodeposition of Mg(OH)2 using an aq. electrolyte contg. MgO-buffered Mg(AcO)2 and heating the duplex-coated sheet to develop secondary recrystn. texture in the Si steel.
Patent KR-810001063-B1 (KR)
Title: Process for preparing improved live new castle disease virus vaccine
Inventor: NATHAN ZYGRAICH
IPC: A61K39/12
Filed: 1978-04-19
Granted: 1981-09-11
Abstract: Aerosol vaccine was prepd. for Newcastle disease virus infection in chickens.  Thus, Newcastle disease virus p-77-8 was cultured in the conceived egg at 34-37oC for 3 days and then cultured virus was collected.  The obtained virus was mixed with peptone, arginine, and sucrose to form a spray.  The prepn. was applied to 1-day-old chicks.
Patent KR-810000805-B1 (KR)
Title: Process for preparing phthalazines
Inventor: CAMPBELL S
IPC: C07D237/34
Filed: 1978-06-01
Granted: 1981-07-08
Abstract: Title compds. (I; R1 = H or lower alkyl; R2 = hydroxy or lower alkoxy; n= 1-3; Y = -Z1-COR3, -NZ2-SO2R5, -z2-CO, -N-R6R7, hydroxy, lower alkanoloxy, or NR6Ralkoxy; n 7 substituted lower alkyl or lower alkoxy; R3 = amino, hydroxy, lower alkoxyary1 heteroaryl substituted lower alkyl; R5 = R3 or -NR6R7; R6 = R4; R7 = H or lower alkyl; Zl = -CH2 or -NR4; Z2 = NR4 or -o-; R4 = H, amino, lower alkoxy, hydroxy, aryl or heteroaryl substituted lower alkyl), useful as cardiac stimulants and phosphodiesterase inhibitors, were manufd. by reacting II with III, followed by eliminating HQ1(Q1 = eliminating group).
Patent KR-840000191-B1 (KR)
Inventor: ITO KANJI
IPC: C07C303/40
Filed: 1980-09-15
Granted: 1984-02-28
Abstract: 내용 없음.
Patent KR-860001927-B1 (KR)
Title: Window frame and thereof fixing process
Inventor: GARTNER KARL
IPC: E06B1/60
Filed: 1983-07-25
Granted: 1986-10-25
Abstract: The window assembly includes a window unit (13) and a number of attachment base plates (15) mounted at suitably spaced intervals on a lower edge (14) of a window opening (12) of the building (10). The window unit includes a rectangular window frame (33) having a pair of top and bottom rails (38, 39). A number of adjustable attachments or anchors(60) are welded to the attachment base plates and are securable to the bottom rail. The anchors are adjustable for positionally adjusting the window unit between the edges.
Patent KR-850001575-B1 (KR)
Title: The process of manufacture for swelling bituminous coals and paint composite with said bitaminous coals
Inventor: JONG YONG-UK
IPC: C09D195/00
Filed: 1983-08-22
Granted: 1985-10-19
Abstract: Swelled bituminous coal is prepared from powdered bituminous coal of 5-100 microns particle size by blending at 200-400≰C temp. a consecutive bituminous material (A) containing aromatic hydrocarbons and coal tar pitch, (B) containing (A) and added maleic anhydride, and (E) containing (B) and a characteristic alkyd. A paint composite for waterproofing and corrosion-protection painting is prepared from the swelled coal by blending it with an epoxy resin having 180-1000 avq. equivalent weight.
Patent KR-910000181-B1 (KR)
Inventor: TANAKA TATSUYOSHI
IPC: C07D401/12
Filed: 1983-09-02
Granted: 1991-01-21
Abstract: 내용 없음.
Patent KR-840001132-B1 (KR)
Title: Process for preparing substituted -oxo- -phenyl-carbamoyl-pyrrolpropionitriles
Inventor: WALKER GORDON NOTHROP
IPC: A61K31/40
Filed: 1984-05-29
Granted: 1984-08-09
Abstract: Title compds. (I; P1=2- or 3-pyrrolyl; R=H, lower alkyl; Ph=phenyl), or the alkyl ether or alkanoyl ester of the enol form of I, useful as antiinflammatory agents, were pre- pared by the reaction of II (X=lower alkoxy, lower alkanoyloxy, halogen) and III. Thus, 1.1g 1-methyl-β-oxo-α-ethoxycarbonyl-2-pyrrolepropionitrile and 1.1g aniline were refluxed in 60 ml xylene for 4.5 hr to give 1-methyl-β-oxo-α-phenylcarbasmoyl-2- pyrrolepropionitrile.
Patent KR-920000761-B1 (KR)
Inventor: SEIDEL PETER R
IPC: C07D417/12
Filed: 1984-06-18
Granted: 1992-01-21
Abstract: 내용 없음.
Patent KR-940001890-B1 (KR)
Title: Method of making polysilicon resistor and semiconductor device using the same
Inventor: BOVRASSA RONALD R
IPC: H01L21/31
Filed: 1985-05-29
Granted: 1994-03-10
Abstract: A method of fabricating a resistor in polysilicon and a semiconductor element suitable for use as a load resistor in a static memory. In the method, after the polysilicon has been doped, the device is annealed by exposing it to a rapid increase of ambient temperature (up to between 900 and 1200 DEG C), maintaining the high ambient temperature for a controlled time (about 5 seconds) and then lowering the ambient temperature at a rapid rate. This decreases resistance by one order of magnitude and significantly decreases the temperature activation energy of the resistor. This permits static memory cells to retain data even through the cell has high leakage currents, thereby improving final test yields.
Patent KR-880002493-B1 (KR)
Title: Mults track complex head
Inventor: CHUNG IK-JU
IPC: G11B5/29
Filed: 1985-09-11
Granted: 1988-11-19
Abstract: The multitrack composite head enables to perform recording and reproducing with high density and speed on a magnetic tape medium which is arranged to have no guard band and limit the crosstalk between adjacent tracks.  In one of the composite heads for write/ read comprising a plurality of heads, the first head's gap inclines at an azimuth angle of -  degree with N/S poles respectively positioned right and left while the next head's gap inclines the spposite way at the same azimuth angle with N/S poles reversed in position.  The heads are combined in the same manner of alternating arrangement as the above.
Patent KR-880002311-B1 (KR)
Title: Process for the preparation of polyurethane ureia elastomere
Inventor: BURGOYNE WILLIAM F JR
IPC: C08G18/10
Filed: 1985-10-11
Granted: 1988-10-22
Abstract: Polyurethane-urea elastomers are prepd. by reacting organic polyisocyanates with 400-12,000 mol. wt. of organic compds. containing at least two hydrogen atoms, and chain extenders. Tertalkyltoluene-diamine compsns. of formula (I)-(III) may be used as the chain extenders.  In the formulas, R1, R2 and R3 are C1-3 alkyl; R2+R3 complete a C5-6 membered ring.  The compsns. are useful as plasticizers or as intermediates in the prepn. of pesticides and alkyd resin modifiers.
Patent KR-900000951-B1 (KR)
Title: Piezo-electric gas lighter
Inventor: SATOYA HISAYOSHI
IPC: F23Q2/28
Filed: 1985-11-15
Granted: 1990-02-19
Abstract: The lighter has the ignition nozzle (101) made of a springy material and attached to the HV generator (100).  A nozzle tip belonging to the ignition nozzle is fixed to an insulating retaining frame (103) near the gas nozzle (102) so that it deforms the HV generator when it moves to and fro.  From the front end of the ignition nozzle electrical energy is discharged in the direction of the gas nozzle. The ignition nozzle consists of a soft metal e.g. phospher bronze. The casing (116) that holds the hammer (118) of the HV generator is made in one piece with a lateral projection (116A) from an electrically conducting resin.
Patent KR-960000778-B1 (KR)
Inventor: JEAN-PIERRE GAUTIER
IPC: B60T13/52
Filed: 1986-09-30
Granted: 1996-01-12
Abstract: 내용 없음.
Patent KR-890003986-B1 (KR)
Title: Chain code axtract circuit for image processing
Inventor: KO SUN-SOB
IPC: G06K9/48
Filed: 1986-12-24
Granted: 1989-10-14
Abstract: The extracting circuit includes a video camera (10), an analog to digital converter (20) converting video signals to images having gray level, a BCD circuit (30), an image memory (40), an image processor (50) expressing a boundary of objects, a host computer (60) which can recognize objects, a window detector (41) obtaining the window of picture, a storage circuit (42) of the chain code, a clock generator (43) and a generator of address (45).  The extracting circuit is concerned with an image processor of 2-dimension.  The image processor can extract boundaries and characteristics of objects.  And it is composed of the hardware operated by the chain-coding.
Patent KR-890004369-B1 (KR)
Title: Checking machine of velocity
Inventor: LEE SANG-YUN
IPC: G01P3/44
Filed: 1987-04-02
Granted: 1989-10-31
Abstract: The tachometer generator is used for measuring an electrically potential difference corresponding to the angular velocity of a motor by being engaged with the rotating motor shaft.  A plurality of pole pieces (6',7') extended from circumferential ends of iron plates which are attached to the upper and lower faces of a permament magnet (1), are arranged to alternatively protrude in the circumferential direction of the permanent magnet. Coils (4) enclosed by a magnetic core (3) intercepts the magnetic flux of the permanent magnet so that the rotation of the magnet generates voltage between the ends of the coils.
Patent KR-970004828-B1 (KR)
Inventor: ISHIZAKA YUJI
IPC: H05B6/06
Filed: 1987-07-03
Granted: 1997-04-04
Abstract: 내용 없음.
Patent KR-890001840-B1 (KR)
Title: Warp knot polyester velour making method
Inventor: KIM BYONG-SAM
IPC: D04B21/02
Filed: 1987-07-11
Granted: 1989-05-25
Abstract: To raise piles in tricot or ruschel fabrics, pile loops (1) are mechanically stretched in tension to form into unidirected triangular loops, whose apexes (a) are cut by a counter-pile roller (3) in a manner of subsequently raising the cut piles in a direction.  The method is simple and saves the fabric from waste. The fabric also gives a soft and smooth feeling in touch.
Patent KR-960006108-B1 (KR)
Inventor: BURTON GREGORY N
IPC: H01L21/225
Filed: 1987-08-21
Granted: 1996-05-08
Abstract: 내용 없음
Patent KR-920000625-B1 (KR)
Inventor: EIMMERMAN PATRICK G
IPC: C09J7/38
Filed: 1987-08-28
Granted: 1992-01-17
Abstract: 내용 없음.
Patent KR-910005295-B1 (KR)
Title: Locking fitting in particular for the sliding leaf
Inventor: GERARD PREVOT
IPC: E05B63/18
Filed: 1987-09-16
Granted: 1991-07-24
Abstract: The locking device (2) is particularly intended for use with a sliding window, door or similar system (1). It incorporates in its housing (15) a slider (18) connected to a hooked bolt (22) engaging with a catch (29) attached firmly to the frame (30). The slider is held by a locking device (34) with a return spring, the locking device (34) being a unit separate from the slider (18). It also incorporates components for positioning (42 to 44) and for holding (41, 48), which engage with complementary components (27, 44, 51, 52) of the sliding door or window (1). 
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Patent KR-900003667-B1 (KR)
Title: Calling time setting method
Inventor: BAE KI-KWON
IPC: H04M3/50
Filed: 1987-09-25
Granted: 1990-05-28
Abstract: The method comprises a first process for checking that a phone is registred to a central office (CO), a second process for recording reserving time and phone number on call reservation list for CO line when the phone is belong to CO, a third process for recording reserving time and phone number on call reservation list for inter line when the phone is connected to the interline, a fourth process for adjusting execution order of the listed reservation and for counting time, and a fifth process for providing ring signal to the reserved opponent and reserver at reserved time.
Patent KR-900000757-B1 (KR)
Title: Gas supply system of a chemical vapour deposition in a low pressure for a refractory metal
Inventor: CHON JI-HUN
IPC: C23C14/24
Filed: 1987-12-14
Granted: 1990-02-15
Abstract: A gas supply system for chemical vapour deposition under low pressure is used for depositing W and WSi2 on Si and GaAs base in process of semiconductor material manufacturing and gives a precise and safe way for the growth of film.  The system has advantages of precise gas flow control by locating hydraulic valve for gas supply time control before mass-flow controller; safety; and easy maintenance of mass- flow controller by installing N2 inlet line, by-pass line, exhaust line, valves and heating tape.
Patent KR-930000917-B1 (KR)
Inventor: OHATA TOMOHISA
IPC: B01J23/63
Filed: 1987-12-18
Granted: 1993-02-11
Abstract: 내용 없음.
Patent KR-910004218-B1 (KR)
Inventor: SADO YOSIAKI
IPC: G01M3/16
Filed: 1988-03-21
Granted: 1991-06-24
Abstract: 내용 없음.
Patent KR-960015171-B1 (KR)
Title: Filament unit of magnetron for electro-magnetic range
Inventor: JUNG PYUNG-SOO
IPC: H01J23/05
Filed: 1988-04-01
Granted: 1996-11-01
Abstract: In the filament unit of the magnetron for the electronic oven, the unit comprises a filament stick 11 having a penetrating hole 11b at a center and spiral grooves at a outside barrier unit and the filament is rolled on the filament stick 11 to one body. The filament unit 1 is disposed between an upper end shield 13 and a lower end shield 14.
Patent KR-910000779-B1 (KR)
Inventor: IIMURO SHIGERU
IPC: C07C37/20
Filed: 1988-05-03
Granted: 1991-02-08
Abstract: 내용 없음.
Patent KR-900007642-B1 (KR)
Title: Novel streptomyces aureus
Inventor: LEE DONG-SOO
IPC: C12N1/20
Filed: 1988-06-03
Granted: 1990-10-17
Abstract: Prodn of tetranactin by mutagen-treated microorganism comprises (a) dispersing spores of streptomyces aureus ATCC 21428 in the TM buffer (pH8.0-8.2), (b) treating the spores with 0.5-2.0 ml/ml of N.T.G. for 15-40 mins, (c) selecting mutants which are much tetranactin producing strains, (d) treating spores of the selected strains with UV light (254 nm), (e) selecting mutants by shaking incubation, (f) culturing the selected mutant in liquid medium at 0.5-1.5 V.V.M of aeration rate and (g) purifying the cultured broth to obtain tetranactin.
Patent KR-900005736-B1 (KR)
Title: Plug valve and method of its lining using four inert ethylene-resin
Inventor: CHUNG HAN-JIN
IPC: F16L58/02
Filed: 1988-07-07
Granted: 1990-08-09
Abstract: The direct lining method of inner side of a plug valve using a 4- fluoroethylene resin consists of: that a rubber bag and core are inseted into the plug valve body and a cover flange and pressing plate are inserted; that 4-fluoroethylene resin powder fills up between the rubber bag and the valve body and top cover is inserted; that the resin powder is oppressed in the waterpressure vessel at 180-350 kg/cm2 for 20-40 min; after putting out from the water- pressure vessel, removing the top cover, assistant ring, pressing plate, cover flange, core and rubber bag; heating in an electric furnance upto 380≰C of heating ratio 40≰C/hr. for 4 hrs.; and the valve body is cooled at room temp..
Patent KR-910004436-B1 (KR)
Title: Tonor recovery method in a copying machine
Inventor: SONG YOON-SUP
IPC: G03G21/00
Filed: 1988-08-08
Granted: 1991-06-27
Abstract: The toner recovering method recovers  the untransfered  toner remaining an the drum surface in to a recovery box in the cleaning unit. In the electrostatic copier using a magnetic  toner  of  one component, recovered toner (4) is carried by a magnetic roller (1) to te passed through a slit (3) in to a recovering tank  (2).  The tonner tank (2) slides along a guide groove (6) of cleaning casing (5).
Patent KR-920000206-B1 (KR)
Title: Process for the preparration of polyester
Inventor: YUN TAE-MO
IPC: C08G63/02
Filed: 1988-08-11
Granted: 1992-01-10
Abstract: The process for producing a  polyester  is  characterized  by reacting    ethyleneglycol    with    terephthalic    acid      or dimethylterephthalate, and then copolymerizing the  reactant  with compound (I) and (II) of a satisfying amount of  (A),(B)  and  (C) equations in the random reaction process. In the (I) and  (II),  R is H or C1-5 alkyl.  In  the  equations,  (A)  is  2.0  x  10-4<= ([a !/[x ) <=2.5 x 10-1; (B) is 1.0 x 10-4  <= ([I /[X )  <= 1.5  x 10-1; (C) is 1.0 x  10-4  <= ([II !/[X )  <= 1.5  x  10-1;  [X   is terephthalic acid or dimethylterephthalate mole; [a  is (I) + (II) mole. The polyester has an excellent mouldability and spinnability and color.
Patent KR-930002564-B1 (KR)
Title: Devices for continuously decaffeinating raw coffee
Inventor: SCHWEINFURTH HERMANN
IPC: B01D11/02
Filed: 1988-10-19
Granted: 1993-04-03
Abstract: During decaffeination of green coffee, the green coffee beans swell to about double their volume. To prevent blockage, coffee beans are therefore kept moving during the pre-swelling, but this leads to detachment, from the surface of the beans, of fine particles, which then clog an adsorber for caffeine adsorption. It is proposed that, at least in the first treatment step, a container is used whose side walls run at least substantially at an angle to each other, forming a conical container space.
Patent KR-910002250-B1 (KR)
Title: Plaster containing active ingredients for controlles administration of active ingredients to the skin
Inventor: HOFFMANN HANS R
IPC: A61M36/00
Filed: 1988-03-22
Granted: 1991-04-08
Abstract: A plaster containing active ingredients for controlled administration of active ingredients to the skin and possessing a rear side and a skin side, has a rear layer, an active ingredient reservoir containing one or more active ingredients arranged essentially perpendicular to the surface of the plaster in contact with the skin, and an adhesive device on the skin side and possibly a covering layer which is detached before application of the plaster. At least one active ingredient reservoir part (12) can be detached on to the skin while one or more active ingredient reservoir parts remain. For this purpose, the part (13) of the active ingredient reservoir remaining on the skin adheres more strongly to the skin than to the rear side (11).
Patent KR-910008911-B1 (KR)
Title: Air-fuel ratio control method for liquid gas
Inventor: CHONG YUN-KWANG
IPC: F02M21/02
Filed: 1989-02-13
Granted: 1991-10-24
Abstract: opening and closing sub- fuel path (5) driven by feed back solenoid for engine  control unit (15) in accordance with input signal from temperature  sensor (10) and oxygen sensor (14), and the fuel cut-off  valve  (7)  and feed back solenoid (9) which is opened and closed in proportion to temperature of cooling water. The space of vaporizer (2) and mixer (3) is formed to main fuel path (4) which is controlled by control screw (6), and sub-fuel path (5) for supplying the  proper  amount of fuel.
Patent KR-0136602-B1 (KR)
Inventor: KARASAWA WATAROO
IPC: H01L21/66
Filed: 1989-02-23
Granted: 1998-04-29
Abstract: 내용 없음.
Patent KR-960006992-B1 (KR)
Inventor: BERNDT ROLAND NILSSON
IPC: B23Q5/40
Filed: 1989-02-28
Granted: 1996-05-27
Abstract: 내용 없음.
Patent KR-0134968-B1 (KR)
Title: Process for the low pressure copolymerization of ethylene with alpha-olefins and ethylene copolymerisates having a very little non-reacted monomer content
Inventor: BORHO KLAUS
IPC: C08F6/26
Filed: 1989-05-06
Granted: 1998-04-20
Abstract: A process for the continuous preparation of ethylene- alpha -olefin copolymers by catalytic dry-phase copolymerisation of the monomers in a stirred or fluidised polymerisation zone, transfer of the resultant mixture of solid copolymer and unreacted gaseous monomers into a decompression zone, reduction of the pressure of the mixture, separation of the mixture into a gaseous phase and a solid phase, the solid phase being preflushed continuously with gaseous ethylene and subsequently being flushed with a mixture of nitrogen and steam, gives ethylene copolymers which have been very substantially freed from residual monomers, fragrances and flavours.
Patent KR-910007986-B1 (KR)
Title: Forming method for cubic pattern roller
Inventor: SONG YOUNG-GI
IPC: B29C35/04
Filed: 1989-06-19
Granted: 1991-10-05
Abstract: The roller embosses concave-convex pattern on  PVC  sheet  or fabric without connection traces.  The  roller  production  method comprises i) glucing relief silicon rubber sheet (5) to  one  side (6) of a press and putting non-vulcanized rubber sheet (4) on  the other side, ii) forming the pattern on the rubber  sheet  (4)  and simultaneously  vulcanizing  the  patterned  portion  by  pressing process,  iii) moving  the  rubber  sheet  to  the  position  for overlapping the patterned/vulcanized portion of the  rubber  sheet (4) and the relief  rubber  sheet  (5),  is  repeating  the  above processes. In the iii) process, the rubber sheet (4a)  is  without connection   traces  because   the   vulcanized   portion     and non-vulcanized are meltingly formed.
Patent KR-920006449-B1 (KR)
Inventor: ASANUMA TADASHI
IPC: C08F2/02
Filed: 1989-07-18
Granted: 1992-08-06
Abstract: 내용 없음.
Patent KR-0141915-B1 (KR)
Inventor: BONHAM JAMES A
IPC: G03F7/029
Filed: 1989-09-06
Granted: 1998-06-01
Abstract: 내용없음
Patent KR-950000051-B1 (KR)
Title: Channel connecting method and apparatus in mobile communication system
Inventor: JO SONG-U
IPC: H04B7/26
Filed: 1989-12-28
Granted: 1995-01-07
Abstract: In the mobile communication equipment using frequency division method, the system saves the favorable channels after measuring and comparing the signal levels of all communication channels allocated to the equipment and tries the RF link set-up according to the order of favorable channels. The system includes a receiver (1) receiving the RF signal, a demodulator (2) demodulating the signal and detecting the intensity of signal, a first voice processor (3) transferring the demodulated factors to speaker, an analog/digital converter (4), a memory (5), a microprocessor (6) controlling the system, a frequency mixer (7) generating the carrier frequency, a second voice processor (8) processing the voice entering into a microphone (M), a modulator (9), a transmitter (10) and a transmitting/receiving separator (11).
Patent KR-960011074-B1 (KR)
Inventor: HEFFRON ALLAN J
IPC: B23B5/18
Filed: 1988-05-13
Granted: 1996-08-20
Abstract: 내용 없음.